This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A004864 #13 Sep 16 2016 16:40:15
%S A004864 0,1,2,128,129,256,2187,2188,2315,4374,16384,16385,16512,18571,32768,
%T A004864 78125,78126,78253,80312,94509,156250,279936,279937,280064,282123,
%U A004864 296320,358061,559872,823543,823544,823671,825730,839927,901668,1103479,1647086
%N A004864 Numbers that are the sum of at most 2 positive 7th powers.
%H A004864 Alois P. Heinz, <a href="/A004864/b004864.txt">Table of n, a(n) for n = 1..10000</a>
%t A004864 With[{p7=Range[0,8]^7},Union[Join[p7,Total/@Tuples[p7,2]]]] (* _Harvey P. Dale_, Jul 22 2012 *)
%K A004864 nonn
%O A004864 1,3
%A A004864 _N. J. A. Sloane_